Artificial limb.



n: 110m ABTIFIOIAL LIMB.

APPLIOATIOI LSD NIB 8, 1912. 1,045,707. Patented Nov. 26, 1912.

lL I

Mull mum 0.. IANINOYON. n. c.

UNITED STATES HOKE, or CORNWALL, PENNSYLVANIA.

A n'rrmcnu. Lima.

Specification of Letters Patent.

Patented Nov. 26, 15112.-

Applleatlon filedhne 8, 1912. Serial No. 702,088.

vision of a simple, inexpensive device of the peg leg type arranged for ermitting the )(3g to stem in alinement wit the axis of the stump socket, or at an an le thereto, wherein means is provided for ocking the r parts in alinement, capable of bein easily ockcd or released through the clothing, and which will hold the parts in rigid alinement when in locked position.

In the drawings: Figure 1 is a front view of one embodimentof the invention; Fig. 2 is an enlarged longitudinal section of the joint; F i 3 is a similar view at right angles to Fig. 2' Fig. 4 is a side view of the embodiment; ig. 5 is a front view of another embodiment; Fig. 6 is an enlarged detail view of the joint; Fig. 7 is a front view of another embodiment; and Fig. 8 is a side view of another embodiment.

The embodiment of the invention shown in Figs. 1 to 4 comprises a socket for, the stump composed of a substantially U-shaped frame, comprisin a bod 1 and arms 2, and a sleeve '8 of lost er or t is like is riveted to the arms near their upper ends. The sleeve is open in front and has a lacing 4 for securing it on the stump.

(Straps 5 are connected with the sleeve for passing over the shoulder to sup ort the.

limb, and a transversely curved p ate 6 is secured to the body 1 of the frame on the inner side thereof, and a cushion 7 is secured on the up er face of the plate for engagement by t 10 end ofv the stump.

The cushion is held in place by screws 8 and the body is rovided with a central downwardly ex'ten ing lug 9, which is slotted from front to rear, as shown, to form a pair of s )aoed cars 10. The pe'g 11-f1 1" is of suitabie length, size, and material and is provided with a rubber inset or cushion "12 st its lower end.

The upper end of .the peg is reduced on each side to form ane'ar orlug) 18, which fits between the'ears 10, and arlvet o'r pivot pin 14 is passed'through theearsldand 13 end is headed at each end to prevent longitudinal movement thereof. The end of la 13 is rounded, as shown at 15 in Fig. 3, and the slot between the ears 10 is shaped to lit the ear or lug 14. The said lug or car 14 is ap roximately semicircular and is of less lengt 1 than the diameter of the peg, so that steps 16 and 17 are formed at each end of the lug to limit the swinging movement of the peg. The stop 16 limits the forward swinging of the peg to a position in alinement with the longitudinal axis of the frame 1-2, and the lug 17 limits the rearward swinging of the peg, as shown in Fig. 3. The cg may swing rearwardly with respect to tie longitudinal axis of the frame through an angle of approximately so that when the wearer is sitting, with the stump at somethin greater than a right angle to the body, tie peg will be approximately r ndicular to the floor. The joint is, in act, a rule joint.

A sleeve 18 is mounted to slide on the peg and on the lugbg of the body of the frame, over the joint. tween the lug and the peg, and own from over the said joint, and the heads 0 the pivot pin 14 are countersunk, so that they will not interfere with the move ment of the sleeve. When the sleeve is in the sition ofFig. 2, the peg is held rigidly in a inement with in 9.

Alatch is provided for holding the sleeve in 'position to lock the peg in alinement with the lug the said latch comprising a stem .19 received in a transverse openin peg, and having a head 20 fitting an enlargement 22 at the outer end of the opening. A sprin 23 encircles the stem in the opening and ars at one end against the bottom of the opening, and at the other against a transverse, pin 24 in the stem. The spring normally holds the head extended, and the said head is in position to engage the lower end of sleeve 18 when the upper end is in contact with'the body of the frame. The head ma be depressed by the finger to permitthes ee'veto move downwn rd, and as soon asthe' sleevemoves over the head the said sleeve holds the latch retracted. The upper end of the e is reduced to form an annular shoulder 2% %or engagement by the lower end of the sleeve when the jointis uncovered. In the present construction the portion of the peg below the shoulder is separable. The upper section 11" of the peg has a longitu'dinal opening or socket 26 for receiving :1

lug 27 on the lower section 11, and any suitg 21 in the Phi able means may be used to hold the lag in the socket With the peg so constructed,-the section 11 may be removed and a new section substituted when the peg becomes worn-01 injured without affecting the joint When the wearer of the leg iswalking, the sleeve 18 is moved upwardly to make the jointri id and is liel in this position b the latch.

When the wearer sits down, t elatch is released by pressing on the head 20, and the sleeve slips down of its own weight thus permittinr the peg to take the position of ig. 3. l'lhe latch may be released and the sleeve moved through the clothing and without any difficulty.

In the embodiment of Fi socket for the stump is similar to that of Fig. 1, but the body 1 of the frame is revided with a longitudinal lug 28 in a meinent with each arm 2, instead of the central lug 9. Each lug is slotted to form s aced cars and the peg 29 extends longitudinally The peg has the rubber inset 32 at its lower end, and the free end of each arm 31 is provided with a circular head 34, which is recent lug 28 and is pivoted thereto by a pin or rivet 83. Each ofthe heads 34 is provided with two notches 35 spaced apart angularly from each other, and the pivot pin 33 is at the center of the head 34.

A latchin device is provided for each arm, each atch comprising a substantial yoke or U-shaped member composed of a body 36 and spaced parallel arms 87. The arms 37 of each member are arranged on o posite sides of the adjacent arm 31, and the said arms 37 are ivotcd to the arm 31, as indicated at 38. he latch may swing'toward and from the head on the pivotal connection 38, and the body 36 of each member is in position to on age the notches 35. The arms 37 of the late 1 are bent outwardly adjacent to the body 30, and the said body is of sutlicient length to extend across the adjacent lug 28. Each of tlie lugs 28 is notched or recessed in register with each notch 85, as indicated at 29, to permit the'latch body to engage the notches 35. The latches me be easily disengaged, by pressin the on s of the body outwardly, after which the peg and yoke may be swung angularly with respect to the socket for the stump or frame 1-2, and may be locked in either position. The arms 37 of the latch are not freely movable with respect to arms 31, sdtha't the latch cannot swing out of engaging position. The disengagement of the body is permitted by the resiliency of the arms 87.

The construction shown-in Fig. 5 is also arranged to limit the forward swin" ng of the peg to a position in alinement with-the long axis of the socket. Movement of the peg farther forward is not necessary, since gs. 5 to 6, the

the joint is only to permit the limb to hand when sitting.

In the embodiment of the invention shown in Fig: 7, the socket for the stump is the same as just described, the body of the frame 1---2 having longitudinal lugs 28 to which are pivoted the arms 42 of a fork, having its body 41 connected to the peg l0. Each of the arms 42 is provided with a lug l3 at its upper end, and each lug 43 is pivoted to the lug 28 by a locking mechanism is the same as that Y shown in Fig. 8, and will be described in the description of that figure.

in or rivet 45. The

In Fig. 8 the 46 is connected to the e gbody 47 of a forli liaving arms 48, each of which is provided with a circular head '19 at its end, and each head is provided with a central 0 enin for receiving a pivot pin .50. The pivot pin connects the head to the :adjacent arm 2 of the frame 1--2 near its 1 junction with the body of the said frame.

from the body 30 of a yoke having arms 31. i

The locking mechanism is the same in both Figs. 7 and 8, the said locking mecha- I nism consisting of a latch lever 62 iaviiig a g i central lug 53, which is received between the ceived between the spaced ears ofthe adjaair of lugs 51 on the adjacent arm of the ork of the peg, and a pivot pin 54 pivotally connects the lu The late lever may be swung against t ie'outer face of the adjacent arm 2 or away from the said arm.

A rin 55 is slidable on the arms 2 adjacent to tie latch lever, and the said ring is adapted to en age over the end of the said lever tolock tie peg in alinemcnt with the .axis of the frame.

When the wearer sits down, the ring is slipped upwardly to re lease the lever and permit the peg to take a, position at right angles to the long axis of r the frame.

It will be evident that any device that will hold the lever in parallelism with the arm 3 .will prevent the peg from swinging move- 'ment. Both arms of the fork may be so arranged if desired.

ment with the long axis of the socket, and

having a second stop for limiting the rear ward swinging of the peg to a position at approximately a right angie to the said axis, a sleeve slidable on the peg over the ivotal connection, the sleeve engaging the liody of the socket at its upper and when over'tho pivotal connection, tne peg having a stop' for limiting the downward siiding movement of the sleeve, and a spring till ltltl pressed stop for enga ing the sleeve to hold the said sleeve over t e pivotal connection, said stop comprising a stem having a head, the peg having an opening for receiving the stem and head, and a sprin in the open ing pressing the stem outwar ly.

2. An artificial limb, comprising a socket for the stump and a p81, said socket comprising a substantially -shaped frame consisting of a body for engagement by the end of the stump and upwardly extending arms, a pivotal connection between the peg and the body of the socket said eg having a stop for limiting the orward swingin movement of the peg to a position in a inement with the long axis 'of the socket, and having a second stop for limiting the rearward swinging of the peg to a position at approximately a right angle to the'said axis a sleeve slidable on the peg over the pivotal connection, the sleeve enga ing the body of the socket at its upper en when over the pivotal connection, the peg having a stop for limiting the downward sliding move a meat of the sleeve, and a spring ressed sto for engagin the sleeve to ho d the sai sleeve over t 10 pivotal connection.

3. An artificial limb, comprising a socket for the stamp and a p35, said socket comprising a substantially -shaped frame consisting of a body for enga ement by the end of the stump and upward y extendmg arms a pivotal connection between the peg an the body of the socket, said pe having a stop for limiting the forwar swin ng movement of the peg to a osition in afi nement with the long axis oft esocket,asleeve slidable on the peg over the pivotal connection, the sleeve on aging the body of the socket at its upper on when over the pivotal connection, the pe having a stop for limiting the downwar sliding movement of the sleeve, and a spring pressed stop for engaging the sleeve to hold the said sleeve over the pivotal connection.

4. An artificial limb, comprising a socket for the stump and a p81, said socket comprising a substantially -shaped frame consisting of a body for enga ement by the end of the stump and upward y extending arms, a pivotal connection between the peg and the body of the socket, a sleeve slidable on the peg over the pivotal connection, the sleeve engaging the ody of the socket at its upper end when over the ivotal connection, the peg having a stop or limiting the downward sliding movement of the sleeve, and a spring pressed stop for engaging the sleeve to hold the said sleeve over the pivotal connection.

5. An artificial limb, comprising a socket for the stamp and a peg, said socket comprising a substantially U-shaped frame consisting of a body for engagement by the end of the stump and upwardly extending arms, a pivotal connection between the peg and the body of the socket, a sleeve slidahle on the peg over the pivotal connection, and a releasable stop for holding the sleeve over the said connection.

6. An artificial limb, comprising a socket for the stump and a peg, said socket comprising a substantially U-shaped frame, consisting of a body and upwardly extending arms, a pivotal connection between the peg and the body, and releasable means for boldll? the peg in alinement with the long axis 0 the socket.

7. An artificial limb, comprising a socket for the stump and a peg pivotally connected to the socket, said connection having means for limiting the forward swingin movement of the peg to a position in alinemcnt with the long axis of the socket, and releasable means for holding the peg in such position.

8. An artificial limb, comprising a socket for the stump and a peg pivotally connected to the socket and releasable means for bold ing the peg 1n alinement with the long axis of the socket,

URIAH HOKE.

Witnesses:

J. 12. Lnnno, Maoom BINNER.

Copies of this patent may be obtained for Me cents each, by addressing the Commissioner of Patents, Washington, D. 0." 

